Double jointing is a process in which two singular pipes are welded together to form up to an 80' length. This process takes place after the internal coating application and prior to any external coating application, meaning that the joint is coated externally at the full 80’ length.

There are several benefits to Double Jointing during the coating process:

Double Jointing reduces the need for Field Joint coating by half, a process in which the pipe weld joints must be coated after welding in the field or at sea before being laid. This is a more expensive and less protective process

Welding joint together prior to transporting them to the field reduces on-site welding in half and reducing the amount of time required for such an installation